Check fans and cooling. Make sure airflow is not obstructed. Bob, K4TAX
Sent from my iPhone > On Dec 19, 2018, at 8:53 AM, Gadget Lust <[email protected]> wrote: > > Hi Don: > > Actually, my issue is only on 10M. It appears that as I transmit, current > consumption increases, and I get occasional high current messages. This is > more apparent on long duty cycle modes like RTTY, and at higher power levels > (80-100W). If I watch, I can see current consumption start at 16 amps, and > slowly rise to 25-27 amps. > > I performed a TX gain Cal successfully, and that made it a bit more stable > (only rising to 20 or 21 amps now), but it still concerns me. A friend > suggested this may be blown coils in the output bandpass filters. I can wrap > new coils if needed, but don’t want to do this if that’s not the problem. > > 73 > Harv > K2PI > > Sent from Mail for Windows 10 > > From: Don Wilhelm > Sent: Wednesday, December 19, 2018 9:44 AM > To: Bob Harvey - K2PI; [email protected] > Subject: Re: [Elecraft] k3 High Current Message on 10 meters > > Harv, > > I did not see the initial post (fault of Nabble vs. the real Elecraft > reflector), but High Current messages can be caused by a low impedance > at the antenna connection, or also a fault in the KPA3, like one output > transistor that is no longer functioning properly. > There are other causes, like incorrect bias to the PA transistors. > Without more specific observations, it is difficult to give a specific > answer. > > Have you tried a TX Gain Calibration on your K3/K3S? If not, try it. > > 73, > Don W3FPR > >> On 12/19/2018 9:30 AM, Bob Harvey - K2PI wrote: >> John did you ever get an answer to this? I have a similar situation. >> >> 73 >> Harv >> K2PI >> >> >> >> -- >> Sent from: http://elecraft.365791.n2.nabble.com/ >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[email protected] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to [email protected] >> > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
